To promote the sales of your goods and/or services you may use video materials and add them to your application. It’s called video-marketing, usage of which will make you more open for the target audience, who will trust you more and will start buying your goods.
To add the video you need to:
After the download you may, by clicking the pencil, edit the name of the downloaded file or by pressing the trash – delete it. Click on the button “Save” to save the result.